Freedom Trail attraction. The Commonwealth’s “new” State House was designed and built in 1798 by Charles Bulfinch, and its dome, having originally been made of wood, was covered in copper by Paul Revere in 1802 and gilded with 23-karat gold leaf in 1874. Free 30-minute tours M-F 10 am-3:30 pm, reservations requested. Visitors should enter at the General Hooker entrance, to the right of the main gate. Open M-F 8:45 am-5 pm.